Reenforced-concrete construction



- Sept. 7 1926. 1,598,693

. P. H. SEREFF v.

REENFORCED CONCRETE CONSTRUCTION Filed April 8, 1924 2 Sheets-Sheet l Sept. 7, 1926.

P. H. SEREFF REENFORCED CONCRETE CONSTRUCTION Filed April 8, 1924 -2 Sheets-Sheet? Hil - an vcnl'oz Patented Sept. 7, 1926.

-UNITED STATES FEEDER H. SER EFF, F LIMA, OHIO.

REENFORCED-CONGRETE CONSTRUCTION.

Application filed April 8,

This invention relates to reenforced concrete constructions, and more particularly to concrete floors and roofs.

An object of the invention is to provide a floor or roof construction having metal cores for the reception of the concrete, which cores are supported by the fabricated reenforcement forming a part of the completed floor or roof construction.

A further object of the invention is to provide a construction in which temporary wooden forms heretofore employed for supporting the cores are eliminated, thus materially reducing the amount oflabor involved in laying the concrete and reducing the final cost of construction.

A further object is the provision of a construction in which a true level surface may be readily obtained.

In the present invention, I provide a fabricated reenforcing member having a bottom flange adapted to serve as a support for the metal core form. The reinforcing members are first assembled and the core forms then placed in a position. This eliminates the wooden supports or shoring heretofore employed, the arrangement of which is estimated to involve 4.0 per cent. of the entire labor cost and which is, therefore, a material item in the cost of constructing concrete floors and roofs.

In the accompanying drawings, I have shown several embodiments of the invention.

In this showing Figure 1 is a side elevation of the fabricated reenforcement and core support for concrete joists, parts being broken away,

Figure 2 is a similar view on an enlarged scale of one end of the reenforcement,

Figure 3 is a vertical sectional view on line 33 of Figure 2,

Figure 4 is a perspective view of an expansion rod arranged between two of the I fabricated reenforcing elements,

Figure 5 is a vertical sectional view of a joist showing the concrete in place and showing a wooden block arranged on top of the reenforcing member for the purpose of supporting a wooden flooring, Figure 6 is a similar viewshowing a con crete flooring, and, Figure 7 is a detail sectional view on line 7-7 of Figure 2.

Referring to the drawings, the reenforcing W member is formed of lower and upper angle 1924. serial'n 705, 80.

irons 1 and 2 which are arranged in pairs, forming horizontal flanges 3 and 4 at the top and bottom. The bottom and top members are connected at their ends by means of plates 5, which extend between the adjacent arms of the angleirons and are secured in position by means of rivets 6 (see Figure 3) The upper and lower members are connected between their ends by substantially V-shaped members 7. The lower ends of these members are provided with extensions 8 adapted to be secured to the vertical flanges 1 of the lower reenforcing member-and the V-shaped members are assembled in the manner shown in Figures 1 and 2 of the drawings forming a truss. Temperature rods 9 are secured to the upper portion ofthe reenforcing members adjacent each edge by means of suitable clips 10 and these rods are provided with inclined port-ions 11 extending downwardly which -are secured to the reenforcing members adjacent the bottom by means of hooks 12. Expansion rods are arranged transversely of the flooring between each pair of reenforcing members. As'shown, (see Figure 4) the expansion rods 13 are of material thickness intermediate their ends and are flattened at each end, as at 14.. The end portical and it is provided with a'lower flange 16 resting on the horizontal flanges 3. The core forms are also provided with extensions 17 at their upper ends which form the ceiling when the construction is completed. At Suitable intervals, the flanges are provided with up-struck portions 17 forming stops to retain the core forms in position. The reference numeral 18 represents the depending portion of the concrete which forms the joist and above this is arranged the portion 3;

19, forming the sub-floor. When a wooden floor is to be laid over the concrete, wooden members 20 are supported on the flanges 4: of the upper reenforcing members and a wooden floor 21 is secured thereto. In Figure 6 of the drawings, I have shown a composition flooring 22 laid on the concrete body 19.

The advantages of this reenforcement and core support will be apparent to those skilled in the art. In building a floor, the reenforc'ements are first arranged in position at the proper distance from each other .to form the joists. The temperature rods are then placed in position. It will be apparent that any desiredarrangement of temperature rod may be employed by merely changing the position of the clips 10 and hooks 12. The expansion rods 13 are arranged between each pair of joists with the ends 14 arranged between the upper members 2, as shown in Figures 5 and 6 of the drawings. The core forms 16 are then placed in position, resting upon the horizontal flanges 3 at the bottom of the reenforcing' members. The horizontal flanges alone support the cores, eliminating the shoring and other lumber usually employed in the temporary form work in the construction of concrete flooring. Either temporary metal cores may be employed and removed after the concrete has set or permanent cores may be employed. The concrete is then poured into the forms, producing the joists 18 and the floor 19. When a flat ceiling is desired, me'tallaths 23 may be secured to the bottom of thejoists and plaster 24 arranged onthe laths in the usual manner.

The space between the upper flanges and the temperature rods 9 permits the concrete to be poured around and under the rods and forms .a more substantial construction.

These rods tie the upper and lower portions of the reenforcing members together, prehowever, that the bottom flanges 3 be ofproper width and shape to support the core forms in a suspended position from thereenforcing members.

It is to be understood that the forms of my invention herewith shown and'described are to be taken as preferred examples of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from-the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. In a concrete floor or roof, a metal reenforcing member, said member bein provided with horizontal flanges at its ower end, said flanges being provided with upwardly extending projections spaced from the outer edges thereof, and core forms supspaced intervals, said reenforcing members being adapted to be embedded in. the concrete when the construction is completed, said reenforcing members being provided with flanges at their lower ends, core forms having portions extending substantially parallel to the main portions of said reenforcing member, said core forms being provided with flanges adapted to rest on the horizontal flanges of said reenforcing members and. support said core forms and being further provided with extensions at their upper ends arranged substantially parallel to said flanges, a ling of concrete arranged within said core forms whereby said core forms may be assembled on said reenforcing members without the use of external supports and fresh concrete poured therein and allowed to harden forming a horizontal floor or ceiling having joists arranged therein at spaced intervals, and temperature rods secured to said reenforcing members adjacent the top and extended diagonally thereof to a paint adjacent the bottom.

t testimony whereof, I aflix my signaure.

PETER H. SEREFF. 

